/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ai.h2o.sparkling.ml.metrics

import org.scalatest.Matchers

object MetricsAssertions extends Matchers {
  def assertMetricsObjectAgainstMetricsMap(metricsObject: H2OMetrics, metrics: Map[String, Double]): Unit = {
    for (getter <- metricsObject.getClass.getMethods
         if getter.getName.startsWith("get")
         if getter.getName != "getCustomMetricValue"
         if getter.getParameterCount == 0
         if getter.getReturnType.isPrimitive) {
      val value = getter.invoke(metricsObject)
      val metricName = getter.getName.substring(3)
      assert(metrics.contains(metricName), s"$metricName is not defined in H2OMetrics.")
      val metricValue = metrics.get(metricName).get
      if (metricValue.isNaN) {
        assert(value.asInstanceOf[Double].isNaN)
      } else {
        value shouldEqual metricValue
      }
    }
  }
}
